1 /* $NetBSD: clrtobot.c,v 1.21 2009/07/22 16:57:14 roy Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)clrtobot.c 8.2 (Berkeley) 5/4/94"; 36 #else 37 __RCSID("$NetBSD: clrtobot.c,v 1.21 2009/07/22 16:57:14 roy Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 #include "curses.h" 43 #include "curses_private.h" 44 45 #ifndef _CURSES_USE_MACROS 46 47 /* 48 * clrtobot -- 49 * Erase everything on stdscr. 50 */ 51 int 52 clrtobot(void) 53 { 54 return wclrtobot(stdscr); 55 } 56 57 #endif 58 59 /* 60 * wclrtobot -- 61 * Erase everything on the window. 62 */ 63 int 64 wclrtobot(WINDOW *win) 65 { 66 int minx, startx, starty, y; 67 __LDATA *sp, *end, *maxx; 68 attr_t attr; 69 70 #ifdef __GNUC__ 71 maxx = NULL; /* XXX gcc -Wuninitialized */ 72 #endif 73 if (win->alines[win->cury]->flags & __ISPASTEOL) { 74 starty = win->cury + 1; 75 startx = 0; 76 } else { 77 starty = win->cury; 78 startx = win->curx; 79 } 80 if (__using_color && win != curscr) 81 attr = win->battr & __COLOR; 82 else 83 attr = 0; 84 for (y = starty; y < win->maxy; y++) { 85 minx = -1; 86 end = &win->alines[y]->line[win->maxx]; 87 for (sp = &win->alines[y]->line[startx]; sp < end; sp++) { 88 #ifndef HAVE_WCHAR 89 if (sp->ch != win->bch || sp->attr != attr) { 90 #else 91 if (sp->ch != (wchar_t)btowc((int) win->bch) || 92 (sp->attr & WA_ATTRIBUTES) != 0 || sp->nsp) { 93 #endif /* HAVE_WCHAR */ 94 maxx = sp; 95 if (minx == -1) 96 minx = (int)(sp - win->alines[y]->line); 97 sp->attr = attr; 98 #ifdef HAVE_WCHAR 99 sp->ch = ( wchar_t )btowc(( int ) win->bch); 100 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 101 return ERR; 102 SET_WCOL( *sp, 1 ); 103 #else 104 sp->ch = win->bch; 105 #endif /* HAVE_WCHAR */ 106 } 107 } 108 109 if (minx != -1) 110 __touchline(win, y, minx, 111 (int) (maxx - win->alines[y]->line)); 112 startx = 0; 113 } 114 return (OK); 115 } 116